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boot very slow after installed Yosemite

I have a Macbook air from October 2013. I have successfully upgraded to Yosemite yesterday from the App store, but the problem begins after that. It boots very slow, sometimes even halt. How can I fix the issue? Thanks.

MacBook Air, OS X Yosemite (10.10)

Posted on Oct 19, 2014 2:10 AM

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Posted on Oct 19, 2014 3:23 AM

I have a similar problem on my Macbook Pro 2011 after downloading Yosemite. Hope someone out there can help.

111 replies

Oct 19, 2014 3:56 AM in response to guma3208

Not sure if this may solve your problem, but I've come across this on one of the Macs here.

  1. Open the disk utility, verify & repair disk permissions, verify & repair the disk if needed.
  2. Restart the mac, hold down Option-Command-P-R to reset the PRAM. It should reboot again.


This helped the bad mac, and we appear to be back to normal.


On my other mac, I go from cold to logged-in within about 12 seconds (I run an SSD).

Oct 21, 2014 5:40 AM in response to guma3208

my boot up times were slow before Yosemite and glacial after.

responsiveness in Finder was the same.

90 secs to display my Applications window content while CPU activity registered less than 10%.

Finally bit the bullet and copied my boot drive to a new drive and then back.

Took 10 hours to copy and 5 hours to restore.

Boot time went from 30-40 mins (once all extensions and apps loaded) to 5 mins.

Given this a an early 2008 MacPro I am happy with the result.

boot very slow after installed Yosemite

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